18.asm

刚学时编的小程序

	ORG 0000H
	AJMP MAIN
	ORG 0003H
	AJMP INT00
	ORG 0030H

MAIN:MOV IE,#81H
	MOV TCON,#01H
	MOV SP,#60H
	MOV A,#0FEH

LIAN:RR A
	MOV P1,A
	ACALL DELAY
	AJMP LIAN


INT00:PUSH PSW
	PUSH ACC
	SETB RS0
	SETB RS1
	MOV R0,#09H
MIE:MOV A,#00H
	MOV P1,A
	ACALL DELAY
	MOV A,#0FFH
	MOV P1,A
	ACALL DELAY
	DJNZ R0,MIE
	POP ACC
	POP PSW
	RETI

DELAY:MOV R2,#20H
ASD:MOV R3,#50H
AED:MOV R4,#50H
	DJNZ R4,$
	DJNZ R3,AED
	DJNZ R2,ASD
	RET

	END